WordPress image interlace filter

wp-filter-interlaced.php

<?php
/**
 * This workaround append interlaced (aka progressive) on images
 * https://korrekt.ch/
 * We salute you ;)
 */
add_filter('wp_generate_attachment_metadata', 'korrekt_wp_generate_attachment_metadata', 99, 2);
function korrekt_wp_generate_attachment_metadata($metadata, $attachment_id)
{
    if (!function_exists('imageinterlace'))
    {
        return $metadata;
    }

    $image = get_post($attachment_id);
    $image_metadata = $metadata;

    if ($image && isset($image_metadata['file']))
    {

        $interlace_jpg = apply_filters('attachment_interlace_jpg', true);
        $interlace_png = apply_filters('attachment_interlace_png', false);
        $interlace_gif = apply_filters('attachment_interlace_gif', false);

        if (!$interlace_jpg && !$interlace_png && !$interlace_gif) {
            return $metadata;
        }

        $source_dir = dirname(get_attached_file($image->ID, true));

        $image_sizes_excludes = apply_filters('attachment_interlace_size_excludes', array(
            'full'
        ));

        foreach ($image_metadata['sizes'] as $size => $data)
        {

            $source_attributes = wp_get_attachment_image_src($image->ID, $size);
            $source_name = basename($data['file']);
            $source_mimetype = (string)$data['mime-type'];
            $source_read = $source_dir . '/' . $source_name;

            if (!file_exists($source_read) || in_array($size, $image_sizes_excludes))
            {
                continue;
            }

            switch ($source_mimetype)
            {
                case 'image/jpeg':
                    if ($interlace_jpg && $ghost = imagecreatefromjpeg($source_read))
                    {
                        imageinterlace($ghost, 1);
                        $image_create = imagejpeg($ghost, $source_read, apply_filters('jpeg_quality', 95, 'edit_image'));
                        imagedestroy($ghost);
                    }
                    break;

                case 'image/png':
                    if ($interlace_png && $ghost = imagecreatefrompng($source_read))
                    {
                        imageinterlace($ghost, 1);
                        $image_create = imagepng($ghost, $source_read);
                        imagedestroy($ghost);
                    }
                    break;

                case 'image/gif':
                    if ($interlace_gif && $ghost = imagecreatefromgif($source_read))
                    {
                        imageinterlace($ghost, 1);
                        $image_create = imagegif($ghost, $source_read);
                        imagedestroy($ghost);
                    }
                    break;
            }
        }
    }

    return $metadata;
}

/* Example usage of filter */

add_filter( 'attachment_interlace_jpg' , 'korrekt_attachment_interlace_jpg' );
function korrekt_attachment_interlace_jpg($state)
{
    // modifiy state if necessary
    // do something here ...
    if ( $state === false ) {
        $state = true;
    }

    return $state;
}

Good filter, thank you
Imageinterlace works only for jpeg